*{
	padding: 0;
	margin: 0;
}
.fl{
	float: left;
}
.fr{
	float: right;
}
body{
	display: flexbox;
}
/*  */
header{
	width: 100vw;
	height: 400px;
}
header>img{
	display: block;
	width: 100%;
	height: 100%;
}
/*  */
/*  */
/*  */
.main_body{
	position: relative;
	display: flex;
	flex-wrap: wrap;
	width: 100vw;
	/* height: 800px; */
	background-color: #f2f2f2;
}
/*  */
.main_body .nav{
	position: absolute;
	display: flex;
	width: 50%;
	height: 15vh;
	background-color: #ffffff30;
	top:0;
	left: 50%;
	transform: translateX(-50%) translateY(-50%);
	box-shadow: 3px 3px 5px #c6c8a69f;
	overflow: hidden;
	transition: 0.8s;
}
.main_body .nav:hover{
	background-color: #ffffff;
}
.main_body .nav .item{
	display: inline-flex;
	width: 25%;
	height: 100%;
	font-size: 4vw;
	justify-content: center;
	align-items: center;
	color: #000000A0;
	text-decoration: none;
	vertical-align: top;
}
.main_body .nav .item .item_t{
	font-size: 3vw;
	text-align: center;
}
.main_body .nav .item .item_t>p{
	display: block;
	font-size: 1vw;
}
.main_body .nav .item:hover .item_t>p{
	text-decoration: underline;
}
/*  */
.main_body .left_content,.main_body .right_content{
	display: inline-flex;
	width: 25%;
	height: 800px;
	justify-content: center;
	align-items: center;
}
.main_body .midle_content{
	display: inline-flex;
	width: 50%;
	height:800px;	
	justify-content: center;
	align-items: center;
}

.main_body .left_content .item,.main_body .right_content .item,
.main_body .midle_content .item{
	position: relative;
	margin-top: 8%;
	width: 90%;
	height: 90%;
	background-color: #FFFFFF;
	box-shadow: 5px 5px 8px #c6c8a6;
}


/*  */
/*  */
/*  */
@font-face {
  font-family: 'iconfont';  /* project id 1895781 */
  src: url('//at.alicdn.com/t/font_1895781_s03hu5ipt89.eot');
  src: url('//at.alicdn.com/t/font_1895781_s03hu5ipt89.eot?#iefix') format('embedded-opentype'),
  url('//at.alicdn.com/t/font_1895781_s03hu5ipt89.woff2') format('woff2'),
  url('//at.alicdn.com/t/font_1895781_s03hu5ipt89.woff') format('woff'),
  url('//at.alicdn.com/t/font_1895781_s03hu5ipt89.ttf') format('truetype'),
  url('//at.alicdn.com/t/font_1895781_s03hu5ipt89.svg#iconfont') format('svg');
}
.iconfont {
  font-family: "iconfont" !important;
  font-size: 16px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@font-face {
  font-family: 'iconfont2';  /* project id 1806618 */
  src: url('//at.alicdn.com/t/font_1806618_cddg53f12hw.eot');
  src: url('//at.alicdn.com/t/font_1806618_cddg53f12hw.eot?#iefix') format('embedded-opentype'),
  url('//at.alicdn.com/t/font_1806618_cddg53f12hw.woff2') format('woff2'),
  url('//at.alicdn.com/t/font_1806618_cddg53f12hw.woff') format('woff'),
  url('//at.alicdn.com/t/font_1806618_cddg53f12hw.ttf') format('truetype'),
  url('//at.alicdn.com/t/font_1806618_cddg53f12hw.svg#iconfont') format('svg');
}
.iconfont2 {
  font-family: "iconfont2" !important;
  font-size: 16px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
